There are no easy lessons to be drawn from this book. It stands more as an invitation to reflect and to be fundamentally disconcerted. Parallels to present democracies are easy to draw, yet conclusions are slippery and difficult to come by.
In Saramago's 1986 novel, The Stone Raft, the Iberian Peninsula breaks adrift from Europe. In his 1995 novel, Blindness, an unnamed country fights a strange plague.
His fiction is ultimately impossible to classify and, for that reason, invaluable. Seeing is no exception; it should be read, and we should be afraid of what we see.
You can find the review here